Ingredient review
Oligopeptide-91 with Botulinum-like Peptide
INCI: SR-Oligopeptide-91, Clostridium Botulinum Polypeptide-1
A synthetic peptide that may help soften expression lines by temporarily relaxing facial muscles, but results are subtle and not comparable to injectables.
In plain English
This is a lab-made peptide that works like a very mild, temporary muscle relaxant when applied to the skin. It's often called 'Botox in a bottle,' but that's an overstatement. It can slightly soften fine lines around the eyes and forehead by reducing the intensity of muscle contractions, but the effect is much weaker than injections and only lasts a few hours.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Oligopeptide-91 with Botulinum-like Peptide is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Oligopeptide-91 with Botulinum-like Peptide.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic oligopeptide (a short chain of amino acids) combined with a polypeptide derived from Clostridium botulinum, designed to mimic the wrinkle-smoothing action of botulinum toxin without the need for injections.
How it works
When applied topically, the peptide is absorbed into the upper layers of the skin and interferes with the release of acetylcholine at the neuromuscular junction. This temporarily reduces the strength of muscle contractions under the skin, which can soften the appearance of dynamic wrinkles like crow's feet and frown lines.
Pros
Non-invasive wrinkle softening
May help reduce the appearance of dynamic wrinkles like crow's feet and frown lines without needles or downtime.
Low irritation potential
Generally well-tolerated by most skin types, with a low risk of irritation or clogged pores.
Cons and cautions
Subtle and temporary results
Effects are mild and last only a few hours, so daily application is needed to maintain any visible benefit.
Overhyped compared to injectables
Marketing often exaggerates its power; it cannot replace professional botulinum toxin treatments for significant wrinkle reduction.
Best for
- People looking for a gentle, non-invasive way to soften fine lines
- Those who want to try a peptide-based anti-aging product
Use caution if
- Anyone expecting results comparable to Botox injections
- People with very sensitive skin or allergies to peptides
Usage tips
Safety summary
Considered safe for topical cosmetic use with a low risk of irritation. However, long-term safety data for this specific peptide is limited, and it should not be used on broken or irritated skin.
Research notes
Clinical studies on similar peptides (e.g., acetyl hexapeptide-8) show modest wrinkle reduction after 4-8 weeks of use. Direct studies on SR-Oligopeptide-91 are scarce, but its mechanism is well-understood.
Common label clues
- Typical concentration
- 0.5% to 5% in leave-on products
- Regulatory status
- Generally recognized as safe for cosmetic use in the US and EU when used as directed. Not classified as a drug.
- Common uses
- Anti-aging serums, Eye creams, Facial treatments
- Environmental note
- Synthetic peptides are produced in labs, so they have a lower environmental footprint than many plant-derived ingredients.
Good to know
- This ingredient is often combined with other peptides or hyaluronic acid for enhanced anti-aging effects.
- It is not a neurotoxin and does not cause paralysis; it only temporarily reduces muscle activity.
Common questions
What is Oligopeptide-91 with Botulinum-like Peptide in beauty products?
This is a lab-made peptide that works like a very mild, temporary muscle relaxant when applied to the skin. It's often called 'Botox in a bottle,' but that's an overstatement. It can slightly soften fine lines around the eyes and forehead by reducing the intensity of muscle contractions, but the effect is much weaker than injections and only lasts a few hours.
What does Oligopeptide-91 with Botulinum-like Peptide do in a beauty product?
When applied topically, the peptide is absorbed into the upper layers of the skin and interferes with the release of acetylcholine at the neuromuscular junction. This temporarily reduces the strength of muscle contractions under the skin, which can soften the appearance of dynamic wrinkles like crow's feet and frown lines.
Is Oligopeptide-91 with Botulinum-like Peptide safe for most people?
Considered safe for topical cosmetic use with a low risk of irritation. However, long-term safety data for this specific peptide is limited, and it should not be used on broken or irritated skin.
Who should be careful with Oligopeptide-91 with Botulinum-like Peptide?
Anyone expecting results comparable to Botox injections People with very sensitive skin or allergies to peptides
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.